1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409ffdcdd4308b5027b5eecbe0b4ee8de8e3c44c6d0b5df44e0b68dcb06957a1. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6571e334-6bcc-45ce-9ce9-801ff1a7f378.json and https://artists.proofprofile.net/proofs/artist/6571e334-6bcc-45ce-9ce9-801ff1a7f378.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).